U/W Project Lab
Menu

A3 · Woodworking calculator

Linear Metre & Stock Length Calculator

Add repeated lengths for battens, edging, trim, skirting or rails. The calculator checks how many equal pieces fit into each stock length instead of relying on total metres alone.

Free to use · no account needed · calculations stay in this browser · formula reviewed 4 September 2026

Enter one repeated length

Use the same finished piece length throughout. Mixed lengths need a separate one-dimensional cutting plan.

Usable stock length removes the entered trim from both ends. Piece fit includes one kerf between adjacent pieces. The stock count is the larger of the fit requirement and your percentage allowance.

Example result using the values shown

Finished length
10.20 m
Length with allowance
11.22 m
Equal pieces per stock length
2
Stock lengths to plan for
6
Purchased length
14.40 m
Estimated cost
£34.56

Piece fit uses 3.2 mm kerf and 10 mm trim at each end. Check defects and your actual cutting sequence separately.

  • 12 equal pieces at 850 mm.
  • 2400 mm stock; 3.2 mm kerf; 10 mm end trim; 10% allowance.

Use this for equal repeated pieces

The calculator first checks how many finished pieces fit into the usable stock after end trim and kerf. It also checks that the purchased stock covers the entered percentage allowance, then uses whichever requirement is larger.

This is not a mixed-length cutting optimiser. Check defects, angled ends, machining allowances and the real cut order before buying or cutting.

Worked example

Twelve 850 mm pieces total 10.20 m. With 10% extra length the planning total is 11.22 m. A 2400 mm length with 10 mm trimmed from each end holds two 850 mm pieces after one 3.2 mm kerf, so six stock lengths are needed, not five.

Linear materials schedule

ProfilePiece lengthQtyStock
_____________ mm________ mm
_____________ mm________ mm